| Patent | Date |
|---|
Optical transmission device and optical transmission method
Grant 11,309,968 - Ngo , et al. April 19, 2 | 2022-04-19 |
Optical Transmission Device And Optical Transmission Method
App 20220006530 - Ngo; Anh Ha ; et al. | 2022-01-06 |
Receiving Apparatus And Decoding Method
App 20210409145 - MIKAMI; KAZUMASA ; et al. | 2021-12-30 |
Optical branching and insertion device, network management device, and wavelength selective switch
Grant 9,071,379 - Oi , et al. June 30, 2 | 2015-06-30 |
Communication system, measuring apparatus, transmitting apparatus, and measurement method
Grant 9,031,418 - Yuki , et al. May 12, 2 | 2015-05-12 |
Optical adding and dropping device and optical transmission apparatus
Grant 8,958,695 - Ooi , et al. February 17, 2 | 2015-02-17 |
Optical Branching And Insertion Device, Network Management Device, And Wavelength Selective Switch
App 20140010535 - OI; Hiroki ; et al. | 2014-01-09 |
Optical transmission apparatus
Grant 8,295,703 - Miura , et al. October 23, 2 | 2012-10-23 |
Communication System, Measuring Apparatus, Transmitting Apparatus, And Measurement Method
App 20120128351 - YUKI; Masahiro ; et al. | 2012-05-24 |
Optical add/drop multiplexer
Grant 8,131,152 - Akiyama , et al. March 6, 2 | 2012-03-06 |
Chromatic dispersion compensating apparatus
Grant 7,936,993 - Ooi , et al. May 3, 2 | 2011-05-03 |
Optical cross-connect using wavelength selective switches
Grant 7,933,519 - Akiyama , et al. April 26, 2 | 2011-04-26 |
Optical Add/Drop Multiplexer
App 20110038636 - AKIYAMA; Yuichi ; et al. | 2011-02-17 |
Method of monitoring optical signal to noise ratio and optical transmission system using the same
Grant 7,873,283 - Akiyama , et al. January 18, 2 | 2011-01-18 |
Interferometer for demodulating differential M-phase shift keying signal
Grant 7,860,408 - Isomura , et al. December 28, 2 | 2010-12-28 |
Optical add/drop multiplexer
Grant 7,853,148 - Akiyama , et al. December 14, 2 | 2010-12-14 |
Wavelength division multiplexing optical transmission system, and wavelength division multiplexing optical transmission method
Grant 7,796,887 - Terahara , et al. September 14, 2 | 2010-09-14 |
Optical add/drop multiplexer
Grant 7,792,428 - Akiyama , et al. September 7, 2 | 2010-09-07 |
Chromatic dispersion compensating apparatus
Grant 7,751,706 - Ooi , et al. July 6, 2 | 2010-07-06 |
Chromatic dispersion compensating apparatus
App 20100135664 - Ooi; Hiroki ; et al. | 2010-06-03 |
Optical transmission apparatus having OADM function
Grant 7,720,383 - Akiyama , et al. May 18, 2 | 2010-05-18 |
Optical node and optical add/drop multiplexer
Grant 7,711,270 - Ooi , et al. May 4, 2 | 2010-05-04 |
Optical transmission apparatus
App 20100028007 - Miura; Akira ; et al. | 2010-02-04 |
Optical transmitting apparatus, method of increasing the number of paths of the apparatus, and optical switch module for increasing the number of paths of the apparatus
Grant 7,620,321 - Miura , et al. November 17, 2 | 2009-11-17 |
Wavelength division multiplexing optical repeating transmission method and repeating apparatus
Grant 7,616,893 - Ooi , et al. November 10, 2 | 2009-11-10 |
Quadrature phase-shift keying modulator and phase shift amount controlling method for the same
Grant 7,603,007 - Terahara , et al. October 13, 2 | 2009-10-13 |
Optical Adding And Dropping Device And Optical Transmission Apparatus
App 20090220242 - OOI; Hiroki ; et al. | 2009-09-03 |
Optical Add/Drop Multiplexer
App 20090148166 - AKIYAMA; Yuichi ; et al. | 2009-06-11 |
Method and System for Transmitting Information in an Optical Communication System Using Distributed Amplification
App 20090136229 - Hoshida; Takeshi ; et al. | 2009-05-28 |
Chromatic dispersion compensating apparatus
App 20090080894 - Ooi; Hiroki ; et al. | 2009-03-26 |
Network designing device and computer-readable medium
Grant 7,505,414 - Nakashima , et al. March 17, 2 | 2009-03-17 |
Quadrature Phase-shift Keying Modulator And Phase Shift Amount Controlling Method For The Same
App 20090047028 - TERAHARA; Takafumi ; et al. | 2009-02-19 |
Method and system for transmitting information in an optical communication system using distributed amplification
Grant 7,483,639 - Hoshida , et al. January 27, 2 | 2009-01-27 |
Raman amplification system utilizing modulated second-order raman pumping
Grant 7,477,446 - Hainberger , et al. January 13, 2 | 2009-01-13 |
Chromatic dispersion compensating apparatus
Grant 7,466,920 - Ooi , et al. December 16, 2 | 2008-12-16 |
Wavelength division multiplexing transmission system
Grant 7,437,074 - Nakamura , et al. October 14, 2 | 2008-10-14 |
Optical fiber cable
Grant 7,415,182 - Terahara , et al. August 19, 2 | 2008-08-19 |
Optical cross-connect using wavelength selective switches
App 20080138068 - Akiyama; Yuichi ; et al. | 2008-06-12 |
Wavelength dispersion compensation design method and a system thereof
Grant 7,382,979 - Akiyama , et al. June 3, 2 | 2008-06-03 |
Optical transmission system, optical repeater, and optical transmission method
Grant 7,372,622 - Nakamura , et al. May 13, 2 | 2008-05-13 |
Raman amplifier and optical communication system including the same
App 20080074733 - Tsuzaki; Tetsufumi ; et al. | 2008-03-27 |
Optical transmission apparatus having OADM function
App 20080056715 - Akiyama; Yuichi ; et al. | 2008-03-06 |
Optical transmission system
Grant 7,336,870 - Ooi , et al. February 26, 2 | 2008-02-26 |
Raman amplifier and optical communication system including the same
Grant 7,307,782 - Tsuzaki , et al. December 11, 2 | 2007-12-11 |
Interferometer for demodulating differential M-phase shift keying signal
App 20070177151 - Isomura; Akihiko ; et al. | 2007-08-02 |
Optical communication system, method for supplying pump light, and distributed Raman amplifying apparatus
Grant 7,233,742 - Hoshida , et al. June 19, 2 | 2007-06-19 |
Method and system for transmitting information in an optical communication system using distributed amplification
App 20070053692 - Hoshida; Takeshi ; et al. | 2007-03-08 |
Optical fiber cable
App 20060251364 - Terahara; Takafumi ; et al. | 2006-11-09 |
Optical transmission system
App 20060193554 - Ooi; Hiroki ; et al. | 2006-08-31 |
Wavelength dispersion compensation design method and a system thereof
App 20060193638 - Akiyama; Yuichi ; et al. | 2006-08-31 |
Optical fiber cable
Grant 7,099,541 - Terahara , et al. August 29, 2 | 2006-08-29 |
Optical transmission system, optical repeater, and optical transmission method
App 20060176545 - Nakamura; Kentaro ; et al. | 2006-08-10 |
Optical transmission system, optical repeater, and optical transmission method
Grant 7,075,709 - Nakamura , et al. July 11, 2 | 2006-07-11 |
Optical node and optical add/drop multiplexer
App 20060140625 - Ooi; Hiroki ; et al. | 2006-06-29 |
Raman amplification system utilizing bi-directional pumping
Grant 7,054,060 - Hainberger , et al. May 30, 2 | 2006-05-30 |
Optical transmitting apparatus, method of increasing the number of paths of the apparatus, and optical switch module for increasing the number of paths of the apparatus
App 20060098981 - Miura; Akira ; et al. | 2006-05-11 |
Optical switch
App 20060093258 - Terahara; Takafumi ; et al. | 2006-05-04 |
Polarization mode dispersion compensator based on degree of polarization
Grant 7,030,973 - Rasmussen , et al. April 18, 2 | 2006-04-18 |
Optical add/drop multiplexer
App 20060034610 - Akiyama; Yuichi ; et al. | 2006-02-16 |
Network designing device and program
App 20060023641 - Nakashima; Hisao ; et al. | 2006-02-02 |
Bidirectionally transmittable optical wavelength division multiplexed transmission system
Grant 6,941,074 - Nakamura , et al. September 6, 2 | 2005-09-06 |
Distributed optical amplifying apparatus, optical communication station, optical communication system, and optical fiber cable
Grant 6,934,454 - Terahara , et al. August 23, 2 | 2005-08-23 |
Distributed optical amplifying apparatus, optical communication station, optical communication system, and optical fiber cable
App 20050157991 - Terahara, Takafumi ; et al. | 2005-07-21 |
Raman amplification system utilizing bi-directional pumping
App 20050152025 - Hainberger, Rainer ; et al. | 2005-07-14 |
Method for gain equalization, and device and system for use in carrying out the method
App 20050094253 - Terahara, Takafumi | 2005-05-05 |
Optical amplifying apparatus for amplifying wide-wavelength-band light, optical sending apparatus, optical transmission system, and optical amplifying method
Grant 6,885,499 - Hoshida , et al. April 26, 2 | 2005-04-26 |
Distributed optical amplifier, amplifying method, and optical communication system
Grant 6,862,134 - Terahara , et al. March 1, 2 | 2005-03-01 |
Control scheme for long wavelength channels in wideband WDM optical fiber transmission system
Grant 6,856,453 - Hainberger , et al. February 15, 2 | 2005-02-15 |
Method for gain equalization, and device and system for use in carrying out the method
Grant 6,829,083 - Terahara December 7, 2 | 2004-12-07 |
Wavelength division multiplexing communications network supervisory system
Grant 6,816,683 - Terahara , et al. November 9, 2 | 2004-11-09 |
Gain equalizer which includes a plurality of optical filters for equalizing the gain of an optical amplifier
Grant 6,807,376 - Shimojoh , et al. October 19, 2 | 2004-10-19 |
Wavelength division multiplexing transmission system
App 20040202473 - Nakamura, Kentaro ; et al. | 2004-10-14 |
Multi-directional optical branching apparatus
App 20040190896 - Terahara, Takafumi | 2004-09-30 |
Wavelength division multiplexing optical repeating transmission method and repeating apparatus
App 20040184814 - Ooi, Hiroki ; et al. | 2004-09-23 |
Distributed optical amplifying apparatus, optical communication station, optical communication system, and optical fiber cable
App 20040141704 - Terahara, Takafumi ; et al. | 2004-07-22 |
Method for gain equalization, and device and system for use in carrying out the method
App 20040136054 - Terahara, Takafumi | 2004-07-15 |
Polarization mode dispersion compensator based on degree of polarization
App 20040124344 - Rasmussen, Jens C. ; et al. | 2004-07-01 |
Optical transmission system and optical transmission method utilizing Raman amplification
Grant 6,741,389 - Kumasako , et al. May 25, 2 | 2004-05-25 |
Distributed optical fiber amplifier using fiber with specific characteristic values
Grant 6,721,481 - Terahara , et al. April 13, 2 | 2004-04-13 |
Method of monitoring optical signal to noise ratio and optical transmission system using the same
App 20040067057 - Akiyama, Yuichi ; et al. | 2004-04-08 |
Tunable optical filter
Grant 6,717,730 - Terahara , et al. April 6, 2 | 2004-04-06 |
Wavelength division multiplexing optical transmission system, and wavelength division multiplexing optical transmission method
App 20040062550 - Terahara, Takafumi ; et al. | 2004-04-01 |
Method for gain equalization, and device and system for use in carrying out the method
Grant 6,693,739 - Terahara February 17, 2 | 2004-02-17 |
Control scheme for long wavelength channels in wideband WDM optical fiber transmission system
App 20040004756 - Hainberger, Rainer ; et al. | 2004-01-08 |
Method and apparatus for measuring optical signal-to-noise ratio, and pre-emphasis method and optical communication system each utilizing the method
Grant 6,654,561 - Terahara , et al. November 25, 2 | 2003-11-25 |
Remote Control Device Of Acousto-optic Tunable Filter And Optical Transmission System Containing Equalizer Using Acousto-optic Tunable Filter And Optical Transmission System Containing Optical Add/drop Multiplexer Using Acousto-optic Tunable Filter
Grant 6,647,211 - Terahara , et al. November 11, 2 | 2003-11-11 |
Chromatic dispersion compensating apparatus
App 20030185568 - Ooi, Hiroki ; et al. | 2003-10-02 |
Method for gain equalization, and device and system for use in carrying out the method
App 20030123135 - Terahara, Takafumi | 2003-07-03 |
Distributed optical amplifier, amplifying method, and optical communication system
App 20030123139 - Terahara, Takafumi ; et al. | 2003-07-03 |
Optical transmission system, optical repeater, and optical transmission method
App 20030117693 - Nakamura, Kentaro ; et al. | 2003-06-26 |
Optical transmission system and optical transmission method utilizing Raman amplification
App 20030099030 - Kumasako, Junichi ; et al. | 2003-05-29 |
Raman amplifier and optical communication system including the same
App 20030063371 - Tsuzaki, Tetsufumi ; et al. | 2003-04-03 |
Optical multiplexing/demultiplexing apparatus and optical multiplexing/demultiplexing method
Grant 6,535,309 - Terahara March 18, 2 | 2003-03-18 |
Tunable optical filter
App 20030016432 - Terahara, Takafumi ; et al. | 2003-01-23 |
Wavelength division multiplexing communications network supervisory system
App 20020196489 - Terahara, Takafumi ; et al. | 2002-12-26 |
Wavelength division multiplexing communications network supervisory system
Grant 6,452,701 - Terahara , et al. September 17, 2 | 2002-09-17 |
Remote control device of acousto-optic tunable filter and optical transmission system containing equalizer using acousto-optic tunable filter and optical transmission system containing optical add/drop multiplexer using acousto-optic tunable filter
App 20020097467 - Terahara, Takafumi ; et al. | 2002-07-25 |
Distributed optical amplifying apparatus, optical communication station, optical communication system, and optical fiber cable
App 20020076182 - Terahara, Takafumi ; et al. | 2002-06-20 |
Wavelength Division Multiplexing Communications Network Supervisory System
App 20020063921 - TERAHARA, TAKAFUMI ; et al. | 2002-05-30 |
Bidirectionally transmittable optical wavelength division muliplexed transmission system
App 20020051267 - Nakamura, Kentaro ; et al. | 2002-05-02 |
Optical Amplifier Reflecting Spontaneous Emission Back Into The Amplifier To Improve Efficiency
App 20020044344 - TERAHARA, TAKAFUMI | 2002-04-18 |
Optical communication system, method for supplying pump light, and distributed raman amplifying apparatus
App 20020044324 - Hoshida, Takeshi ; et al. | 2002-04-18 |
Method for gain equalization, and device and system for use in carrying out the method
App 20020041433 - Terahara, Takafumi | 2002-04-11 |
Gain equalizer which includes a plurality of optical filters for equalizing the gain of an optical amplifier
App 20020033995 - Shimojoh, Naomasa ; et al. | 2002-03-21 |
Gain equalizer which includes a plurality of optical filters for equalizing the gain of an optical amplifier
Grant 6,344,914 - Shimojoh , et al. February 5, 2 | 2002-02-05 |
Tunable optical filter
Grant 6,339,492 - Terahara , et al. January 15, 2 | 2002-01-15 |
Bi-directional wavelength switching device and wavelength demultiplexing/multiplexing device
Grant 6,307,656 - Terahara October 23, 2 | 2001-10-23 |
Bi-directional wavelength switching device and wavelength demultiplexing/multiplexing device
App 20010017960 - Terahara, Takafumi | 2001-08-30 |
Apparatus and method for controlling power levels of individual signal lights of a wavelength division multiplexed signal light
Grant 6,271,945 - Terahara August 7, 2 | 2001-08-07 |
Tunable optical filter
App 20010010593 - Terahara, Takafumi ; et al. | 2001-08-02 |
Method for gain equalization, and device and system for use in carrying out the method
Grant 6,219,176 - Terahara April 17, 2 | 2001-04-17 |
Bi-directional wavelength switching device and wavelength demultiplexing/multiplexing device
Grant 6,211,980 - Terahara April 3, 2 | 2001-04-03 |
Apparatus and method for controlling power levels of individual signal lights of a wavelength division multiplexed signal light
Grant 6,134,034 - Terahara October 17, 2 | 2000-10-17 |
Method for optical amplification and system for carrying out the method
Grant 6,097,535 - Terahara August 1, 2 | 2000-08-01 |
Optical wavelength multiplexing and demultiplexing device and an optical transmission system using the same
Grant 6,061,157 - Terahara May 9, 2 | 2000-05-09 |
Optical receiver having a function for suppressing useless intensity modulation components
Grant 6,052,221 - Terahara April 18, 2 | 2000-04-18 |
Method and apparatus for scrambling the polarization of signal lights forming a wavelength division multiplexed signal light
Grant 5,841,557 - Otsuka , et al. November 24, 1 | 1998-11-24 |
Optical receiver having a function for suppressing useless intensity modulation components
Grant 5,841,571 - Terahara November 24, 1 | 1998-11-24 |
Optical transmission method and apparatus and optical amplification method and apparatus for optical communication system
Grant 5,729,372 - Terahara , et al. March 17, 1 | 1998-03-17 |
Optical transmission method and apparatus and optical amplification method and apparatus for optical communication system
Grant 5,539,566 - Terahara , et al. July 23, 1 | 1996-07-23 |
| 